Event: B Division

Opponent Rating Result
Carl Stephens 1584 0 - 1
P Ged Murphy 1525 1 - 0
Carl Stephens 1584 ½ - ½
Chris Swales 1567 ½ - ½
Jim A Rogers 1648 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1502 = (7908 + 400 * (1 - 2)) / 5)

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